Pick.



No. 779,839. PATENTED JAN. 10, 1905.

J. CHEVALLARD.

PICK.

APPLICATION FILED MAR.15, 1904.

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Patented January 10, 1905.

PATENT OEErcE.

JOHN OHEVALLARD, OF MILLERSBURG, OHIO.

PICK.

SPESIFICATION forming part of Letters Patent No. 779,839, dated January10, 1905.

Application filed March 15,1904. Serial No. 198,277.

To all whom, it may concern:

tional contour of the points or engaging ex:

tremities of such nature that said points or extremities may be readilyturned laterally with greater resistance to breakage and moreeffectiveness in breaking up or removing the material in which the pickextremities are embedded.

The invention consists in the construction and arrangement of theseveral parts, which will be more fully hereinafter set forth.

In the drawings, Figure 1 is a perspective view of a pick embodying thefeatures of the invention. Fig. 2 is a top plan view of the same. Fig. 8is a transverse vertical section through the eye. Fig. 4 is a transversevertical section on the line 4 4, Fig. 2.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates the eye of the improved pick, from whichpointed extremities or blades 2 extend in opposite directions. Theessential feature of the invention resides in the cross-sectionalcontour of the extremities or blades 2, as clearly shown by Fig. 4. Inordinary pick structures the cross-sectional contour of the taperingextremities or blades 2 is square, and the upper and lower sides of thesquare are in parallel relation, and in the use of such pick the anglesthus disposed will cause the extremities or blades to stick or catchunder or in the material engaged by said extremities, and a twisting orturning pressure will set up such resistance in view of the position ofthe angles as to fracture or otherwise injure the extremities or blades.This weakness of the ordinary pick extremi- 5 ties or blades is due tothe fact that the distance between the opposite sides of the squarecontour thereof is less than the distance between the angles ordiagonals of the extremities. The improved pick herein disclosed aims toovercome these disadvantages by disposing the angles at diametricallyopposite upper and lower points and at the sides, thereby increasing thethickness of material, particularly in a transverse direction, asclearly shown by Fig. 4 and indicated by dotted line 3. By employing thecross-sectional contour of the pick extremities or blades 2, as shown byFig. 4, it will be seen that the faces of said extremities are atreverse angles of inclination, and particularly the lower faces,whichwill permit the pick extremity togive way if resistance is made when itis embedded in material, especially when the pick is turned laterally,and as the greatest thickness of metal is in a direction transversely ofthe pick extremity injury to or breakage of the latter is less liable tooccur. In other words, when the pick is embedded in material desired tobe broken or removed it enters the same after the manner of a doublewedge. Another advantage in forming the pick extremities or blades asjust set forth is the facility afforded thereby in producing the eye,for the reason that the upper and lower edges 4 and 5 are directly inthe center and may be prolonged as much as possible to serve as guidemeans, and thereby materially assist in locating the eye centrally.

It will be observed that the lower edge 5 of the pick is extendedunbrokenly into a thickened portion adjacent to the eye. By thisconstruction the eye is greatly lengthened, whereby it takes a firmerhold upon the griphandle and also acts as a shield when one of thepoints of the pick is placed in the fire to prevent the heat fromcharring the handle of the pick or causing the eye to expand in suchmanner as to loosen it upon said handle. The lower edge 5 isparticularly effective as a guiding means for locating the eye for thehandle. The improved pick has the extremities or blades thereofintegrally formed with the eye, all joints or shoulders being avoided,and thus preventing retardation of the pick when embedded in material tobe broken up or removed. Another advantage of the improved pickextremity 0r blade is that it can be more readily sharpened. During thesharpening operation of the points or extremities of the pickconstructed in accordance with the features of the invention the pickwill be prevented from becoming overheated or having an increasedtemperature, and thereby prevent the handle from loosening in the eyedue to expansion. This is a material disadvantage in ordinary pickstructures.

It will be understood that changes in the proportions and dimensions ofthe several parts of the pick may be resorted to without departing fromthe spirit of the invention.

Having thus fully described the invention, what is claimed as new is Apick comprising a transverse enlarged or elongated flat outer-surfacedeye portion having the opposite front edges of the pick-arms curvedupwardly therefrom to the terminal points of the arms, said frontportions of the arms being provided with wedge or V shaped cutting edgeswhich extend continuously from the eye to said ends, and the oppositeback edges of the arms being constructed of the same configuration of\l-shaped cutting edges as those of the front edges, and the ends of the\I-shaped portions of the front and back edges of the two armsmergingone into the other at their opposite ends to form a fourcorneredtapering drive-point.

In testimony whereofI affix my signature in presence of two witnesses.

JOHN CHEVALLARD.

Witnesses:

D. M. BILDERBUOK, A. J. Knox.

